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open-exchange-rates

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Zero-dependency Java library for real-time currency exchange rates. Supports 165+ currencies (ISO 4217), 5 providers with automatic failover, TTL caching, and parallel queries on Java 21+ via virtual threads. Works on Java 8 through Java 25+, Android-compatible.

  • Updated Mar 25, 2026
  • Java
convert-currency-api

Lightweight currency conversion library — cashify-compatible API with optional auto-fetch from the AllRatesToday API. 160+ currencies, mid-market rates, zero runtime deps.

  • Updated Apr 20, 2026
  • TypeScript

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